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(11)

EP 4 055 703 A1

(12)

(43) Date of publication: 14.09.2022 Bulletin 2022/37 (21) Application number: 20884454.8 (22) Date of filing: 29.10.2020

(51) International Patent Classification (IPC):  H02M 1/08(2006.01) H02M 1/06(2006.01) H02M 7/483(2007.01) H02M 1/36(2007.01) H02M 3/07(2006.01) (52) Cooperative Patent Classification (CPC): H02M 1/36; H02M 7/4837 (86) International application number: PCT/US2020/057956 (87) International publication number: WO 2021/091765 (14.05.2021 Gazette 2021/19)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 06.11.2019 US 201962931406 P (71) Applicant: Efficient Power Conversion Corporation El Segundo, CA 90245 (US)	(72) Inventors: ZHANG, Yuanzhe Torrance, CA 90504 (US) DE ROOIJ, Michael A. Playa Vista, CA 90094 (US) WANG, Jianjing Mountain View, CA 94043-4827 (US) (74) Representative: Ehrner & Delmar Patentbyrå AB  Götgatan 78 118 30 Stockholm 118 30 Stockholm (SE)